we are offering Brass Screws. Threads : » ISO metric (MM Threads). » BA Threads. » BSW Threads. » UNC & UNF Threads. » As Per Customers Requirements. Material : In Case Of Turned Machine Screws... » Free Cutting Brass IS 319 Type (I) or » Free Cutting Brass As Per BS 249 Type (I) or » High Grade Free Cutting Brass. » Any Special Brass Material Composition As Per Customers Requirement.